Improvement in self-discharging fulverizing-earrel



'usualor other suitable materials. the customary cylindrical form, and mounted on axial trunuions A, which, being madehollow, aliord the ne- ALMAhIN '13.:PAUL. or SAN reminisce, ouLIroRnrA.

Letters Pal-tent No.-1 02,85 7, dated May 10, 1870.

I IMPROVEMENT m enLr-mscasueme PUnv'nmzme-nsnaen.

The Schedule referred to in these Letters Patent and making part of the same. .1

I, ALMARIN B. PAUL, of the city and county of Description. of Draiv'tngs. 'lheacconipanying drawings, making a part of this specification, representa pulverizing-barrel embodying my improvements-r- .Figure 1 being a transverse section, and

Figure 2 an interior perspective view of the same.

General Description.

My improved pulve'rizing-barrcl may be made of Ithe It is preferably of cessary means for the introduction of the material, and enable its introduction continuously.

The-barrel is provided in. its sides with one or more openings covered by-screens C D, (one or more,) for the discharge of the material as reduced. Shields or guards B, of suflicient strength, and suitably perforated for the passage of the reduced material, protect the screens from the weight of the material and the pulverizing media, enabling-them'to be employed.

The screens maybe of any suitable form, and when a plurality are: employed may be of graduated size.

The shields audthe intermediate screens 0 (when such are employed) are so constructed and arranged that their rear edges shall be sufficiently elevated toallow the discharge of any material which ,inayremain on top of the screens beneath for further pulnrerizing. I

The screens-and their shields may extend the entire length of the barrel or any portion of it, being of proper relative area, and may be attached in any suitable manner.

I Qllhe barrel is mounted-in suitable bearings, andpro vided with a. pulley, or its equivalent, for the application of motion to it, and supplied with loose heavy stones, pieces of iron, or quartz rock, or their equivalent, to perform the operation-of pulverizing, as usual.

A tight case may inclosc the barrel and confine the dust.

The hopper or hoppers forthe supply of the material to be pulverized being elevated, and the conduits therefrom leading through the hollowtrunnions of the.

barrel, the material may. pass by gravity to the interior, and thus the apparatusbe rendered entirely automatic. 7 I

' Operation. The operation of the barrel is as follows: Motion being imparted and the materialto be pulverized supplied, the same is reduced by the crushing and pounding action of itself and the usual additional weights, the shields B forming a portion of the supporting or abutting surface. I

As the material is pulverized, the particlessufiiciently small pass through the openings in the shields while they are at the bottom, onto the upper screens, and in turn through the screens to the outside,-the

I particles remaining 'on top of the screens being discharged into the mass again in the continued rotation of the barrel, for further treatmenht-hrougb the space at their elevated rear edges, .The material being fed by gravity, as proposed, the operation. may be 0on 'tinuous. i.

. Ola-trim;

I claim as-my invent-iou- I l. The combination with a pulverizing-barrel oi screens 0 D, (one or more,) arranged in its sides, protectedby shields B,'constructed'and arranged to operate in themanner substantially as described, as, 'and for the purposes set forth.

2. The pulverizing-barrcl, provided with discharging-screens B C D, constructed and' operating as herein described, as constructed with hollow trunnions'A for the introduction of material to be treated, as shown, for the purposes explained. I

' ALMARIN. B. PAUL. Witnesses:

T. B. WmGAnD, I WILLIAM H. BATE. 

